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Fixed bug #51528 (Bug when parsing WND_SCALE option)

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Signed-off-by: goldsimon <goldsimon@gmx.de>
(cherry picked from commit 2e78b6dcae)
This commit is contained in:
Pascal Quantin 2017-07-24 21:38:47 +02:00 committed by goldsimon
parent 32aa50cfbc
commit ac880ea907
1 changed files with 2 additions and 2 deletions
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4
src/core/tcp_in.c
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@ -1749,11 +1749,11 @@ tcp_parseopt(struct tcp_pcb *pcb)
LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: bad length\n")); LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: bad length\n"));
return; return;
} }
/* An WND_SCALE option with the right option length. */
data = tcp_getoptbyte();
/* If syn was received with wnd scale option, /* If syn was received with wnd scale option,
activate wnd scale opt, but only if this is not a retransmission */ activate wnd scale opt, but only if this is not a retransmission */
if ((flags & TCP_SYN) && !(pcb->flags & TF_WND_SCALE)) { if ((flags & TCP_SYN) && !(pcb->flags & TF_WND_SCALE)) {
/* An WND_SCALE option with the right option length. */
data = tcp_getoptbyte();
pcb->snd_scale = data; pcb->snd_scale = data;
if (pcb->snd_scale > 14U) { if (pcb->snd_scale > 14U) {
pcb->snd_scale = 14U; pcb->snd_scale = 14U;